ssh jump fail abou banner invalid characters
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sshd
journal on both jumphost
and jumptarget
----------
Full logs are too long to be pasted. uploaded to gist
three files are logs that :
Local -> Jumpper -> Debian by ssh -j
Local -> Jumpper -> Debian by ssh Debian
Local -> Jumpper by ssh jumpper
Jumper -> Debian by ssh 10.10.10.3
FYI: During this time, the IP address was re-planned 10.10.1.3 -> 10.10.10.3
, and a domain was added in the hosts
. These shouldn't have any effect on the problem.
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A similar problem is [SSH ProxyJump on macOS Catalina is not working](https://superuser.com/q/1510997) . but the answer doesn't solve my case
I'm configuring ssh jump with the following configures:
Host Jumper
HostName domainName
User username
Port 1234
Host Debian
HostName 10.10.1.3
User username
Port 22
ProxyJump Jumper
The result of ssh Debian -vvv
is
...
debug1: kex_exchange_identification: banner line 0: \033(B\033[mSSH-2.0-OpenSSH_9.2p1 Debian-2
kex_exchange_identification: banner line contains invalid characters
...
it shows OpenSSH, so I think the port should be correct
ssh Jumper
is fine, and manully ssh 10.10.1.3
on jumper is also fine.
The local host is a Macos at OpenSSH_9.0p1
and the others are OpenSSH_9.2p2
Asked by Leo
(1 rep)
Sep 18, 2023, 02:41 AM
Last activity: Jul 17, 2025, 09:28 AM
Last activity: Jul 17, 2025, 09:28 AM